This nut is a new design and its just a little bit more lighter then the original classic HB400
The helical nurling keeps the wheel nuts in place by digging into the wheel (as a fishing hook, easy to tighten, difficult to loosen) keeping them from unscrewing and falling off.
Made from solid aircraft 6061-T6 aluminum
Thread = 18 mm x 1mm
Thread depth 11.6mm - (.455")
ATTN: 1 Package contains 4 wheel nuts.
FIT : HPI 5B/5T/5SC